same here when i did it.
like i said its junk.. the towel trick is shit.
just send it back and have them fix it.. then when you get it back you can wait for it to fuck up again and repeat the process.
seriously it will happen again.
when the refurb them, all they do is put another heatsink in it to help with cooling. obviously they fix the solder, but the heatsink isnt enough to keep it cool, it will overheat again.. and it will melt the solder, it will seperate cause the xclamp isnt strong enough to hold it in place. and the mem chips dont have enough pressure on them to keep from seperating under heat either.
im in the works right now of building a fiberglass stand with 6 80mm pc fans that a 360 can sit on to help with cooling.
it will have its own power supply, and a space for the power brick to sit on as well, since there is alot of complaints about the power supply brick getting overheated as well.
hopefully this will help with cooling enough to avoid disaster again.
i know i know there are cooler kits for them already. but word is they are junk, and some have experinced worse heating issues even to the point where the cooler will melt with the 360.
ill post a pic of what i have in mind.